Organic Winegrowers New Zealand (OWNZ) is a grower-led association dedicated to supporting and encouraging the production of organic wines in New Zealand.

Founded in 2007 by organic viticulturists and vineyard owners from every major wine region in New Zealand, OWNZ is an independent incorporated society, governed by and for its members. The organisation is led by a national executive committee of organic and biodynamic winegrowers, and by regional grower committees in several wine regions. 

To promote networking and learning, OWNZ delivers field days and workshops on organic winegrowing throughout New Zealand. Other projects include creation of online and printed resources on organic growing; marketing and publicity about NZ organic wines; and organic research projects. In spring 2011 the Organic Focus Vineyard project was launched, a research and demonstration project highlighting the process of converting a vineyard to organic management. OWNZ works in partnership with New Zealand Winegrowers, who provide collaboration and some funding support.